https://userapps.support.sap.com/sap/support/knowledge/en/2593940
2593940 - Change of minimum duration of Maternity absence | SAP Knowledge Base Article
Infotype 2001 prevents creating a maternity absence ( e.g. 3000 ) with a duration shorter than 112 days (6 weeks). The system displays the error message: "...
sap knowledgechangeminimumduration